Shiftably mounted work guide



Aug. 9, 1938. R. J. SAILER SHIFTABLY MOUNTED WORK GUIDE Filed April 27,1957 2 Sheets-Shet 1 g we/Mm R udo l ah' daailer Aug. 9, 1938. R. J.SAILER SHIFTABLY MOUNTED WORK GUIDE Filed April 27, 1937 2 Sheets-Sheet2 IIIIIIIIII/IIIIIIl/L lllll H. n;

Rudolph J Sui/Le?" Patented Aug. 9, 1938 S HIFTABLY MOUNTED WORK GUIDERudolph J. Sailer, Townley, N. J., assignor to The Singer ManufacturingCompany, Elizabeth, N. J., a corporation of New Jersey Application April27,

4 Claims.

This invention relates to improvements in workguiding attachments forsewing machines and has for its primary object to provide means formanually swinging a work-guiding attachment .5 laterally of the line ofscam formation to vary the position of the delivery end of thework-guiding attachment relative to the stitch-forming mechanism.

The features of the present invention will be clearly understood fromthe following description and accompanying drawings in which:

Figure 1 is a front end elevation of a portion of a sewing machinecontaining the present improvement.

Figure 2 is a front side elevation of a portion of a sewing machinehaving the attached workguides.

Figure 3 is a top plan View.

Figure 4 is a sectional view taken substantially along the line 4--4 ofFigure 3.

In the illustrated embodiment of this invention, I ll is the cloth-plateof a sewing machine which is carried by the bed ll. Overhanging the bedis the usual hollow head [2 of the machine in which is journaled theneedle-bar I3 carrying needles l4 and the presser-bar l5 carrying apresser-foot l6. Cooperating with the needles l4 in the formation of twospaced rows of chainstitches are the'thread-carrying loopers I! and I8which are disposed below the throat-plate l9 and actuated to movecrosswise of the line of seam formation. Projecting through suitableopening in the throat-plate I9 is a work-advancing feed-dog 20. Theactuating mechanisms for the loopers and feed-dog are not shown as theyare old and well known.

Adiustably fixed to the cloth-plate II] by the screws 2| and slots 22 isan L-shaped supporting plate 23 which carries a flat tension-finger 24and an oppositely bent guide-pin 25 beneath which the tape T is led.Adjustable means 26 is provided for adjusting the amount of pressure onthe tape.

Pivotally secured by the screw 2'! to the supporting plate 23 is aswingable bracket 28 formed with a downwardly bent portion 29 and alaterally extending portion 30. Fixed to the portions 29 and 30 by thescrews 3| and 32 is an edgefolder or hemmer 33. Also carried by thepivoted 50 bracket 28 is a tape-guide 34 which is slidably anddetachably secured to the plate 28 by the guide-blocks 35 andspring-latch 36. For a more detailed description of the folder andtape-guide reference may be had to my prior Patent No. 1,828,722, datedOct. 20, 1931.

1937, Serial No. 139,120 (Cl. 112-143) Fixed to the plate 23 by thescrews 31 is a member 38 having a laterally bent portion 39 and fixed tothe pivoted bracket 28 by the screws 40 is a member 4|. A coiledcompression spring 42 is interposed between the members 38 and 4| andtends to move the bracket in a clockwise direction about the pivot 27 asviewed in Figure 3. To limit the movement of the bracket 28 about itspivot 21 a shouldered screw 43 extends through a slot 44 in the bracketand is threaded into the supporting plate 23.

In the operation of the above described device an elastic tape T is ledunder the tensionfinger 24, through the tape-guide 34, and be neath thepresser-foot It. The material is then inserted into the hemmer in theusual manner with the hem-fold embracing the tape and when the hemmerand tape-guide are in their normal positions the needles l4 are spacedapart so as to penetrate the work at opposite sides of and adjacent thetape to thereby form a pocket for the tape.

In many instances it has been found desirable to cause one of theneedles to penetrate the tape at intervals and secure the same bystitches to the body material. To accomplish this there is secured tothe bracket 28 by the screws 45 an L- shaped member 46, one of the legsof which extend downwardly. Cooperating with the member 43 is a camelement 41 which is secured to a rock-shaft 4B journaled in the bearings49 and 50 carried by the plate 23. Also fixed to the rock-shaft 48 is anL-shaped actuating lever the free end of which is adapted to beconnected to a foot treadle or knee-lever (not shown) by means of achain. From the above it will be understood that when the free end ofthe lever is pulled downwardly, the shaft 48 is rocked in acounterclockwise direction, as viewed in Figure 4, and this movementcauses the element 41 to cam the member 46 to the left. The member 46being fixed to the bracket 28 the latter is caused to move in acounterclockwise direction about its pivot Z'l. The hemmer andtape-guide are carried by the bracket 28 and, therefore, this movementof the bracket causes the delivery ends of the hemmer and tape-guide toshift crosswise relative to the line of seam-formation or the needlesl4. As the needles are spaced apart so as to penetrate the hem-fold atopposite sides of and adjacent the tape when the folder and tape-guideare in their normal positions, the shifting of the delivery ends of thefolder and tape-guide cause the hem-fold and tape to be shifted so thatone of the needles will penetrate the tape and stitch it to the bodymaterial. It will be obvious that the delivery end of the attachment maybe shifted at the will of the operator, thereby permitting the tape tobe stitched to the hem-fold at any time during the process of insertingthe tape in the hem-fold.

The screw 43 and slot 44 are so arranged that the spring 42 will forceone end of the slot 44 against the screw, thereby constantly tending tomaintain the attachment in its normal position so that when the free endof the lever is released the attachment will assume the position shownin Figure 3. In order to adjust the amount of shifting movement whichmay be imparted to the attachment a stop-member 52 is secured to therock-shaft 48 by means of the setscrews 53. This stop-member is adaptedto engage the plate 23 to limit the movement of the free end of thelever 5|. It is obvious that the set-screws 53 may be loosened and thestop-member 52 adjusted on the shaft 48 so as to vary the limit ofmovement of therock-shaft 48.

Having thus set forth the nature of the invention, what I claim hereinis:- v

1. In combination, a sewing machine having a pair of spaced needlesarranged in a plane transverse to the direction of feed, a hemmer fordownwardly inturning the edge of the material to form a hem-fold andarranged in advance of said needles, a tape-guide for directing anelastic tape into the hem-fold, means for pivotally securing saidtape-guide and hemmer to the machine, manual means under the control ofthe operator for simultaneously shifting said hemmer and tape-guideabout said pivot to cause one of said needles to penetrate both thematerial and elastic tape and spring means for maintaining said hemmerand tape-guide in their normal positions.

2. An attachment for sewing machines comprising a plate adapted to beadjustably secured to the machine, a bracket pivoted to said plate, ahemmer and tape-guide carried by said bracket, a rock-shaft journaled inbearings fixed to said plate, manually controlled means for actuatingsaid shaft, a cam' element carried by said shaft and means carried bysaid bracket and cooperating with said lever for swinging said bracketabout its pivotal connection.

3. An attachment for sewing machines comprising a supporting plateadapted to be secured to the frame of a sewing machine, a bracketpivotally secured to said plate, a hemmer adjustably secured to saidbracket, a tape-guide slidably carried by said bracket, spring means formaintaining said bracket in its normal position relative to saidsupporting plate, manually controlled means for moving said' bracketabout its pivotal connection with the supporting plate and means forlimiting the amount of swinging movement which may be imparted to saidbracket.

4. An attachment for sewing machines comprising a supporting plate, arock-shaft carried by said plate, a cam element fixed to said rockshaft,a member movably carried by said plate, a hemmer fixed to said member, alug carried'by said member and cooperating with said cam element andmanually controlled means for moving said rock-shaft about itslongitudinal axis to cause said member and hemmer to be shiftingrelative to said supporting plate.

RUDOLPH J. SAILER.

